Heebeet cotteell



(No Model.)

H. COTTRELL.

AIR GARBURETING APPARATUS. No. 249,013. Patented Nov. 1,1881.

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UNITED States PATENT Gratce.,

HRBERT (JOTTRELL, OF NEWARK, NEW JERSEY.

AIR-CARBURETING APPARATUS.

SPECIFICATION forming part' of Letters Patent No. 249,013, dated November 1, 1881.

Application filed April 22, 188i. (No model.) v

To all whom t't may concci'a:

Be it known that I, HEnBER'r Oo'r'rRELL, of Newark, in the county of Esscx and State of New Jersey, have invented certain new and useful Improvementsin Air-Carburetin gApparatus, of which the following is a specification.

My invention relates to improvements in that well-known kind of air-carbureting apparatus in which the hydroearbon Vapor, before being mixed with the air, is employed as a motive agent for working an air-pump to supply air to the mixing-chamber, and for working another pump for supplying hydroearbon liquid to the vaporizing-chamber.

My invention consists in the combination of an air-pump cylinder, au engine-cylinder arranged in line therewith, an interposed mixing-ehamber communicating with a gas-reservoir, passages from both of said cylind'ers to said mixing-chamber for deliverin g hydrocarbon vapor and air into said Chamber, pistons fitted to said cylinders, and a piston-rod connectin g said pistons and working through said mixing-chamher, whereby I produce acompact apparatus so constructed that any air or gas which may escape thron gh the piston-rod stuff'- ing-boxes is delivered into said mixing-chamber. The engine and pump cylinders are preferably secured at the ends to said mixing-charnber and supported thereby, and the said mixin gchamber also serves as a means for supporting the gas reservoir or holder, whereby the construction of the apparat-us is greatly simplified.

Another part of my invention is applicable to apparatus in which hydrocarbon liquid is injected into the valve-chest of the engine and there Vaporized by heat applied to the exterior of said valVe-chest, and consists in the combination, with an air-pump,.an engine, means for heating the valve-chest of said engine externally, and a gas reservoir or holder comprising a movable top, of a pump for supplying hydrocarbon liquid to the engine-cylinder, mechanism connected with the engine for Operating the pump-plunger to cause the pump to fill With liquid, a spring or weight for eft'ecting the opposite movement of the pump-plunger, a catch for holding said plunger against the force of the spring or weight, and a rod connected with the' movable top of said reservoir or holder for releasing the pump-plunger to permit its operation by the spring or weight, whereby the supplyof hydrocarbon liquid and the operation of the engine are regulated by the supply of gas contained in the reservoir or holder. The engine is provided with suitable valve-Operating mechanism, and the plunger of the pump for supplying hydrocarbon liquid is preferably set77 or moved to cause the liquid to fill the pump by mechanism connected with the valve-Operating mechanism, and after the plunger is so set it is held by the catch, while the valve-gear continues to operate without again moving the plunger until the latter is released from its retaining-catch by the decrease of gas in the reservoir or generator.

In the aecompanyingdrawings, Figure 1 represents a longitudinal section through a carbureting apparatus embodying my inv'ention; and Fig. 2 represents a side view of said apparatus, looking from the opposite direction to that indiea'ted by said section.

Similar letters of reference designate corresponding parts in both the figures.

A designates the air-pump cylinder for supplying air to be carbureted, and B designates a piston fitted to reciprocate therein.

O designates the engine-cylinder, and D the piston thereof, by which the air-pump piston is operated. As here represented the cylin- (lers are arranged in line, and the pistons B and D are secured to a common piston-rod, E.

F designates a mixing-cha'mber interposed between the cylinder-s A and G, and receiving from them hydroearbon vapor and air, which are mixed therein to form gas. The gas reservoir or holder G, with which the mixing-chamber communicates, is in the present instanee placed above and supported upon the mixingch amber, which latter also forms a part of said reservoir or holder. The reservoir or holder is constructed with a movable top, G', having the usual water-Seal, a, though the reservoir might be of bellows form.

The air-pump, which is represented as doubleacting, is constructed with inlet or suction valves b at each end, and outlet or discharge valves o, through which air is discharged into a discharge-chest, A', and supplied to the mixing-chamber F through a duet or passage, d. The engine is also represented as double-acting, and the exhaust hydrocarbon vapor is de- IOO livered therefrom through a duet or passage, e, to the said mixing-chamber.

It will be observed that the air-pump and engine oylinders are secured at the end to the mixing-chamber F, thereby supporting the cylinders and efl'ecting the connection of the air and exhaust vapor passages with the mixing-chamber without the necessity of pipe-connections, thereby simplifying the apparatus and lessening the danger of leakage. lt will also be observed that inasmuch as the pistonrod E works through the mixing-chamber, the stuffing-boxes f for said rod are packed from the inside of the mixing-chamber, and any vapor or air that may escape from the air-pump cylinder A and engine-cylinder C will be discharged into the miXng-chamber, and any loss from leakage thereby ohviated.

The mixing-chamber F is provided at its bottom with a pipe, g, for drawing OE any hydrocarbon liquid which may accumulate in the said chamber through condensation, and said chamber is also provided with a pipe, h, for the discharge of gas or carbureted air from the reservoir or holder G.

The engine-cylinder U which I have here represented is provided with a chest, (J', made separate from the cylinder an d arran ged upon the under side thereof. This chest is constructed with suitable induction and eduction ports,and the valve, here represented as an ordinary slide-valve, H, works upon the upper inner face of the chest as a seat, and is moved by a toe, i, upon a rock-shaft passing through the side of the chest and having an attached arm,j, outside the chest. (See Fig. 2)

The piston-rod E within the mixing chamber F is provided with a disk, I, of oblatespheroidal or lens-like form, and J J designate curved arms supported on a rock-shaft, K, inserted through the side ot' the mixing-chamber. The arms J J embrace or project upon each side ofthe disk 1, and by the longitudinal movement of the piston-rod E the disk is caused to act upon said arms and impart an oscillating motion to the rock-shaft K. Upon the outside of the mixing-chamber is a bar, L, supported so as to permit of its longitudinal movement, and having two projecting tappets or projections, k

M designa-tes a weighted trip-lever loosely pivotedi upon the rock-shaft K, and provided with a toe, l, projectin g between the tappets k.

N designates a collar or hub fixed uponthe rock-shaft K, and having a peripherical recess, m, receiving a pin,n, projecting from the triplever M. The bar L is connected by a link, o, with the arm j, and by its longitudinal movement imparts the desired movement to the valve H.

It is obvious that as the rock-shaft K commences its oscillation the end of the peripherical recess m in the hub or collar N, bearing upon the pin n in the lever, moves said lever upward toward a Vertical position; but as soon as said lever passes said Vertical position its weight causes it to fall and complete the th row ot' the bar L and the movement of the valve H.

In the engine here represented hydrocarbon liquid is supplied to the valve-chest C' through a pipe,p, and vaporized by means of gas-burners q, arranged underneath the chest, or any other suitable means.

O designates a pump for supplying hydrocarbon liquid to thc valve-chest C' from any source of supply. As here represented, the plunger of the pump O is operated by a lever, P, pivoted at and the end of which lever is adapted to engage with a stop or detent, 8, here shown as consisting ot' a curved plate provided with a hole for receiving the end of the said lever.

Q desiguates a rod or link having a slotted connection with the toe l and lever P, and serving to depress the lever P when 'the latter is elevated, and cause it to engage with the stop or detent 8,' hut, owing to the slotted connection of the link Q with the toe l and lever P, the engine may continue working when the lever P is depressed or set without impartng any fnrther motion to it.

R designates a spring which is compressed by the operation of setting the lever P, and which, as soon as the said lever is released from the stop or detent 8, will impart an upward movementto the lever and force the liquid contained in the pump O into the valvechest C'.

S designates a rod held in a suitable guide, t, and adapted to be depressed by a lug or ear, a, (see Fig. 1,) upon the movable top G' of the reservoir G striking its upper end. When the said rod is forced down its lower end Strikes the curved stop or detent 8, and, forcing it to one side, releases theleverP and permits the spring R to actuate the pump-plan ger to th row acharge of hydrocarbon liquid into the valve-chest C'. By the next movement of the engine the lever P and spring R will be set by the link Q, and the plunger of the pump O, which may be of a size or have its stroke adjusted to hold liquid for eifecting one or more strokes of the enginepiston, will be raised to cause the pump to fill with liquid. The engine will then work until the supply of liquid injectcd into the chest O' is all vaporized and exhausted without imparting any fnrther movement to the lever P, which will be held by the detent 8 until the supply of gas in the reservoir or holder G becomes so much reduced that the rod S is depressed by the downward movement of the movable top G' and caused to release the lever P from the stop or detent 8. The spring R will then throw said lever upward, injectiug a new supply of liquid into the valve-chest C', and causin g the engine to resume its operation.

lt is obvious that a weight might be suitably arranged to take the place of the spring R.

It will be understood that the operation of the engine and the discharge of air into the mixing-chamber are automatically controlled by regulating the injection of hydrocarbon liq- IIO uid into the valve-chest O', and that the hydrocarbon liquid may be stored at any desired distance from the building containing the apparatus and supplied to the engine by the pump in just such quantities as are needed to main tain the requisite amount of gas in the reservoir or holder G.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, in an air-carburetin g apparatus, of an air-pump cylinder, the cylinder of an engine to be operated by hydrocarbon vapor arranged in line with said pump-cylinder, an interposed mixing-chamber constituting or communicating with a gas-reservoir, ducts for dischargin g both said cylinders into said mixing-chamber, pistons fitted t') said cylinders, and a piston-rod connectingsaid pistons and working through said miXing-chamber, substantially as and for the purpose specified.

2. The combination,in an air-carbureting apparatus, of an air-pump cylinder, a hydrocarbon-engine cylinder arrangedin line therewith, an interposed mixing-chamber, to which said cylinders are secured at the ends and by which they are supported7 a gas reservoir or holder provided with a movable top arranged above and supported upon said mixin g-chamber, ducts for dischargin gand d eliverin g hydrocarbon Vapor and air from said cylinders to said mixingchamber, pistons fitted to said cylinders, and a single piston-rod, to which said pistons are connected,working through said mixing-chamber, substantially as and for the purpose specified.

3. The combination of the air-pump cylinder A and piston B, the engine-cylinder O and piston D, the rod E, connecting` said pistons, the interposed miXing-chamber F, the valve H, the disk I, the curved arms J J, the rock-shaft K, and mechanism actuated by Said rock-shaft for Operating the valve H, all arranged and operating substantially as specified.

4. The combination, in a carbureting appa-. ratus, with an air pump, a hydrocarbon-engine, means for heating the valVe-chest of said engine externally, and a gas reservoir or holder comprising a movable top, of a pump for supplying hydrocarbon liquid to said valve-chest, mechanism actuated by a spring or weight for Operating the plunger of said pump, mechanism connected with the engine for moving said plunger in one direction and setting the spring or weight, a catch for holding said spring or Weight when so set, and a rod connected with the top of said reservoir or holder-for releasing said spring or Weight, substantially as and for the purpose specified.

5. The combination, with the air-pump and Operating-engine, of the reservoir or holder G and movahle top G', pump O, lever P, springl R, or a weight, catch s, rod S, trip-lever M, and slotted link Q, all arranged and Operating substantially as specified.

HERBERT COTTRELL.

Witnesses:

FREDK. HAYNEs, A. G. WEBB. 

